Exhaust Flap Short Circuit to Ground
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Joined: Sep 2020
Posts: 53
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Exhaust Flap Short Circuit to Ground
Hey there, I’m having an issue with my 2015 S63 sedan I had a connector that was broken (from previous owner) so I went ahead and got a new connector. I plugged everything up the same like the other side with the wiring in same slots. However, I’m still getting exhaust flap and exhaust flap 2 short to ground. Is anyone able to shed some light on this issue?
I traced the wires in the trunk but it goes into a big harness and from there I’m not sure where it runs to. I don’t believe there is a fuse for this because it’s not specified in any of the fuse boxes.
Anyone in the DMV area with an S63 that would be willing to let me look at their car to see how the wiring to the plug is ran?
These exhaust flaps are annoying af. It doesn’t even show the wiring diagram in WIS. I’ve already checked with no luck. Someone help!
I traced the wires in the trunk but it goes into a big harness and from there I’m not sure where it runs to. I don’t believe there is a fuse for this because it’s not specified in any of the fuse boxes.
Anyone in the DMV area with an S63 that would be willing to let me look at their car to see how the wiring to the plug is ran?
These exhaust flaps are annoying af. It doesn’t even show the wiring diagram in WIS. I’ve already checked with no luck. Someone help!
Super Member
Joined: May 2011
Posts: 971
Likes: 270
From: Fort Worth TX
2020 S560, 2014 SLK55 (Prev. 2016 S65, 2013 SLK350, 2008 CLS63, 2006 E350, 2006 CLS500, 2005 C230K)
Has test been performed to note if the short is in the actuator or the wiring?
The wiring will be on WIS, probably looking with incorrect term.
The wiring will be on WIS, probably looking with incorrect term.
Thread Starter
Junior Member
Joined: Sep 2020
Posts: 53
Likes: 10
- Removed actuator to inspect spring and any water deposits inside the pin area (nothing broken or any pins showing corrosion)
- Tested the actuator plugged in while off the muffler to see any resistance because of the spring (still shows same fault code)
- Plugged one side each time to determine if one actuator was at fault. Only thing I figured out here was that exhaust flap 2 is on driver side muffler and exhaust flap is on passenger side
- Inspected connectors to see any wires touching other pins and traced wires to see if any insulation was damaged. Nothing was found here either
- If anyone can assist me on how to read the voltage, I can try running that to see if wires are getting correct voltage. With car engine started I get lower voltage on each pin (like 2 volts max on 2 pins, third shows 0 volts, guessing that’s ground). With car ignition on and engine off, I got like 3 volts on two pins and 0 on last pin
Super Member
Joined: May 2011
Posts: 971
Likes: 270
From: Fort Worth TX
2020 S560, 2014 SLK55 (Prev. 2016 S65, 2013 SLK350, 2008 CLS63, 2006 E350, 2006 CLS500, 2005 C230K)
Onboard diagnostics is indicating short to ground, test actuator and wiring for resistance.
If short found on actuator replace component.
If short found on wiring disconnect control unit and test.
If test continues to indicate short replace wiring.
If short disappears diagnose control unit.
If short found on actuator replace component.
If short found on wiring disconnect control unit and test.
If test continues to indicate short replace wiring.
If short disappears diagnose control unit.
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Super Member
Joined: May 2011
Posts: 971
Likes: 270
From: Fort Worth TX
2020 S560, 2014 SLK55 (Prev. 2016 S65, 2013 SLK350, 2008 CLS63, 2006 E350, 2006 CLS500, 2005 C230K)
Since you are looking for a short removing the parts was not necessary.
Continue to check wiring for short.
Continue to check wiring for short.
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Member
Joined: Apr 2016
Posts: 172
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From: Houston, TX
2017 S550 coupe, 2013 E550 coupe, 2008 Tahoe
Oil solenoid is on a fuse labeled engine electronics. Just because it’s not specified doesn’t mean it’s not on a fuse. Maybe check each fuse in the trunk fusebox.
Last edited by wheatswake; Feb 23, 2025 at 08:50 AM.
Thread Starter
Junior Member
Joined: Sep 2020
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Last edited by MercBenz22; Feb 23, 2025 at 08:59 AM.
